Osorno vs Villarrica AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Osorno and Villarrica. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: Osorno (4-pt gap)PM2.5: Osorno 43.0 ug/m3 · Villarrica 43.4 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-01–2025-01-01 and 2024-04-07–2024-12-31.

Compare two cities

City A

City B

Osorno vs Villarrica

Osorno

Los Lagos, Chile

106

PM2.5: 43.0 ug/m3
PM10: 52.1 ug/m3
Worst month: May
Trend: n/a

EPA category: Unhealthy for Sensitive Groups

Villarrica

Araucanía, Chile

110

PM2.5: 43.4 ug/m3
PM10: n/a ug/m3
Worst month: July
Trend: n/a

EPA category: Unhealthy for Sensitive Groups

Lower average AQI in this selected period: Osorno. Values are historical OpenAQ-derived city summaries, not live readings.

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Osorno

107

187

130

163

155

122

Villarrica

136

122

151

140

118

What this comparison measures

Average EPA AQI — city-level daily AQI values averaged across the OpenAQ coverage window.
PM2.5 and PM10 — mapped monitor concentrations aggregated to daily city averages.
Seasonality — worst and cleanest months from the monthly city rollups.
Trend — difference between the earliest and latest yearly AQI average in this build.